From 13290364e7bea54164ab83d973951f2898ad9e23 Mon Sep 17 00:00:00 2001
From: Stefan Strogin <steils@gentoo.org>
Date: Sat, 16 May 2020 02:33:37 +0300
Subject: [PATCH] FFmpegUtilities: replace variable definition with statement
 expression

It is needed to avoid multiple definitions of AV_GET_CODEC_CONTEXT,
which is considered as an error with '-fno-common' which is default
since gcc-10.

Fixes: #511
---
 include/FFmpegUtilities.h | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/include/FFmpegUtilities.h b/include/FFmpegUtilities.h
index 62d64df17..b4ec951f8 100644
--- a/include/FFmpegUtilities.h
+++ b/include/FFmpegUtilities.h
@@ -163,11 +163,10 @@
 		#define AV_FREE_CONTEXT(av_context) avcodec_free_context(&av_context)
 		#define AV_GET_CODEC_TYPE(av_stream) av_stream->codecpar->codec_type
 		#define AV_FIND_DECODER_CODEC_ID(av_stream) av_stream->codecpar->codec_id
-		auto AV_GET_CODEC_CONTEXT = [](AVStream* av_stream, AVCodec* av_codec) { \
-			AVCodecContext *context = avcodec_alloc_context3(av_codec); \
-			avcodec_parameters_to_context(context, av_stream->codecpar); \
-			return context; \
-		};
+		#define AV_GET_CODEC_CONTEXT(av_stream, av_codec) \
+			({ AVCodecContext *context = avcodec_alloc_context3(av_codec); \
+			   avcodec_parameters_to_context(context, av_stream->codecpar); \
+			   context; })
 		#define AV_GET_CODEC_PAR_CONTEXT(av_stream, av_codec) av_codec;
 		#define AV_GET_CODEC_FROM_STREAM(av_stream,codec_in)
 		#define AV_GET_CODEC_ATTRIBUTES(av_stream, av_context) av_stream->codecpar
@@ -199,11 +198,10 @@
 		#define AV_FREE_CONTEXT(av_context) avcodec_free_context(&av_context)
 		#define AV_GET_CODEC_TYPE(av_stream) av_stream->codecpar->codec_type
 		#define AV_FIND_DECODER_CODEC_ID(av_stream) av_stream->codecpar->codec_id
-		auto AV_GET_CODEC_CONTEXT = [](AVStream* av_stream, AVCodec* av_codec) { \
-			AVCodecContext *context = avcodec_alloc_context3(av_codec); \
-			avcodec_parameters_to_context(context, av_stream->codecpar); \
-			return context; \
-		};
+		#define AV_GET_CODEC_CONTEXT(av_stream, av_codec) \
+			({ AVCodecContext *context = avcodec_alloc_context3(av_codec); \
+			   avcodec_parameters_to_context(context, av_stream->codecpar); \
+			   context; })
 		#define AV_GET_CODEC_PAR_CONTEXT(av_stream, av_codec) av_codec;
 		#define AV_GET_CODEC_FROM_STREAM(av_stream,codec_in)
 		#define AV_GET_CODEC_ATTRIBUTES(av_stream, av_context) av_stream->codecpar
